key mesh and squishy animation

src/squish_animation.rs

@@ -0,0 +1,20 @@
+use bevy::prelude::*;
+use ops::sin;
+
+#[derive(Component, Reflect)]
+#[reflect(Component)]
+pub struct SquishAnimation(pub f32);
+
+pub fn plugin(app: &mut App) {
+    app.add_systems(Update, update);
+}
+
+fn update(mut query: Query<(&mut Transform, &SquishAnimation)>, time: Res<Time>) {
+    for (mut transform, keymesh) in query.iter_mut() {
+        transform.scale = Vec3::new(
+            keymesh.0,
+            keymesh.0 + (sin(time.elapsed_secs() * 6.) * 0.2),
+            keymesh.0,
+        );
+    }
+}